Most hardware wallets use a random number generator (RNG) to create your seed phrase. Coldcard's RNG was weak—attackers could guess or brute-force possible seeds. This is why 'keeping your seed safe' wasn't enough; the seed itself wasn't as random as it should be.
Hardware wallet manufacturers push firmware updates. A compromised update or intercepted update can install backdoors. Check firmware hashes against official sources, verify signatures, and avoid connecting wallets to untrusted computers during updates.
1. Buy from official channels only, not secondary markets. 2. Verify firmware signature before updating. 3. Test wallet with small amounts before moving large holdings. 4. Use a passphrase (25th word) to add a second layer. 5. Keep device firmware updated monthly.
A single hardware wallet brand failing means your choice of RNG failed. Split holdings across 2-3 different hardware wallet manufacturers. If Ledger, Trezor, and Coldcard each hold 1/3, a flaw in one doesn't touch the others.
Yes—with vigilance. Hardware wallets remain superior to online exchanges. But they're not perfect. Treat them as tools, not magic. Update firmware, verify signatures, diversify brands, and test with small amounts before trusting with large holdings.
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